KR950000846Y1 - Reverse washing device for water purifier - Google Patents
Reverse washing device for water purifier Download PDFInfo
- Publication number
- KR950000846Y1 KR950000846Y1 KR2019910021489U KR910021489U KR950000846Y1 KR 950000846 Y1 KR950000846 Y1 KR 950000846Y1 KR 2019910021489 U KR2019910021489 U KR 2019910021489U KR 910021489 U KR910021489 U KR 910021489U KR 950000846 Y1 KR950000846 Y1 KR 950000846Y1
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- South Korea
- Prior art keywords
- filter assembly
- hollow fiber
- water purifier
- adsorption
- fiber filter
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 41
- 238000005406 washing Methods 0.000 title 1
- 239000012510 hollow fiber Substances 0.000 claims description 40
- 238000001179 sorption measurement Methods 0.000 claims description 28
- 239000012528 membrane Substances 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 14
- 239000008213 purified water Substances 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 5
- 238000011001 backwashing Methods 0.000 claims 5
- 239000012535 impurity Substances 0.000 description 10
- 241000894006 Bacteria Species 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000019640 taste Nutrition 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/30—Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 막형정수기를 보인 부분단면도.1 is a partial cross-sectional view showing a conventional membrane type water purifier.
제2도는 본 고안 역세척장치가 구비된 막형정수기를 보인 부분 단면도.Figure 2 is a partial cross-sectional view showing a membrane type water purifier equipped with the subject innovation backwash device.
제3도는 본 고안의 분해사시도.3 is an exploded perspective view of the present invention.
제4도와 제5도는 본 고안의 작용상태를 보인 부분 확대 단면도.4 and 5 are partially enlarged cross-sectional view showing an operating state of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
31 : 전처리필터조립체 33 : 흡착필터조립체31: pretreatment filter assembly 33: adsorption filter assembly
35 : 중공사필터조립체 44 : 선택밸브35: hollow fiber filter assembly 44: selection valve
45 : 유입관 46 : 유출관45: inlet pipe 46: outlet pipe
47,48 : 연결관 49 : 배수연결관47,48: connector 49: drain connector
50 : 밸브케이싱 52 : 밸브동체50: valve casing 52: valve body
53 : 직경통로 54,55 : 안내유로53: diameter passage 54, 55: guide passage
56 : 평패킹56: flat packing
본 고안은 막형정수기의 역세척장치에 관한 것으로, 특히 전처리 필터와 흡착필터를 거친 물을 최종단의 중공사필터에 역류시켜 중공사필터의 중공사막이 조기에 폐색되는 현상을 방지하여 정수필터의 수명을 연장시킬 수 있도록한 막형정수기의 역세척장치에 관한 것이다. 종래의 막형정수기는 제1도에서 보인 바와같이, 전처리필터 조립체(1), 흡착필터조립체(2)와, 중공서필터조립체(3)로 구성되고, 전처리필터조립체(1)에는 내부에 전처리필터링(4)이 장설되어 있으며 흡착필터조립체(2)내에는 흡착필터링(5)이 장설되어 있고 중공사필터조립체(3)내에는 중공사막필터(6)가 장설되어 있다.The present invention relates to a backwash device of a membrane type water purifier, and in particular, the water passed through the pretreatment filter and the adsorption filter is flowed back to the hollow fiber filter at the final stage to prevent the hollow fiber membrane of the hollow fiber filter from being blocked early. The present invention relates to a backwash device for a membrane water purifier that can extend its life. The conventional membrane type water purifier is composed of a pretreatment filter assembly 1, an adsorption filter assembly 2, and a hollow filter assembly 3, as shown in FIG. 1, and the pretreatment filter assembly 1 has pretreatment filtering inside. (4) is installed, and the adsorption filter assembly (2) is installed in the adsorption filter assembly (2), and the hollow fiber membrane filter (6) is installed in the hollow fiber filter assembly (3).
급수호오스(7)가 전처리필터링(4)의 외주연공간에 연통된 유입구(8)에 전처리필터조립체(1)에서 전처리필터링(4)의 내주연공간에 연통된 유출구(9)는 흡착필터링(5)의 외주연공간에 연통된 유입구(10)에 연결되고 흡착필터링(5)의 내주연 공간에 연통된 흡착필터조립체(2)의 유출구(11)는 중공사필터조립체(3)의 유입구(12)에 연결되며 그 유출구(13)는 호수구(14)측으로 연결되어 있다.The inlet port (9) communicating with the inner peripheral space of the pretreatment filter (4) in the pretreatment filter assembly (1) is connected to the inlet (8) in which the feed hose (7) communicates with the outer periphery space of the pretreatment filtering (4). The outlet 11 of the adsorption filter assembly 2 connected to the inlet 10 communicated with the outer peripheral space of 5) and communicating with the inner peripheral space of the adsorption filtering 5 is an inlet port of the hollow fiber filter assembly 3. 12) and its outlet 13 is connected to the lake mouth 14 side.
이와같은 종래기술의 막형정수기는 급수호오스(7)를 통하여 공급된 물은 전처리필터조립체(1)의 유입구(8)에서 그 내부의 전처리필터링(4)등으로 공급되며 이 전처리필터링(4)의 외측으로부터 내측으로 지나면서 1미크로 이상의 입자상 불순물이 여과되며 이와같이 여과된 물이 흡착필터조립체(2)를 지난다.In this prior art membrane type water purifier, the water supplied through the water supply hose 7 is supplied from the inlet 8 of the pretreatment filter assembly 1 to the pretreatment filtering 4 therein, and the like of the pretreatment filtering 4. 1 micron or more of particulate impurities are filtered out from the outside to the inside, and the water thus filtered passes through the adsorption filter assembly 2.
전처리필터조립체(1)에서 1미크로 이상의 입자상 불순물이 여과된 물은 그 유입구(10)를 통하여 흡착필터링(5)의 외측으로부터 내측으로 지나면서 이 물속의 잔류염소와, 냄새가 맛을 유발시키는 물질이 흡착제거된다.Water filtered with particulate impurities of 1 micron or more in the pretreatment filter assembly 1 passes through the inlet 10 from the outside of the adsorption filtering 5 to the inside, and the residual chlorine in the water and the substance causing the taste. This adsorption is removed.
그리고 이 흡착필터조립체(2)를 지난 물은 중공사막필터조립체(3)를 지난다.Water passing through the adsorption filter assembly 2 passes through the hollow fiber membrane filter assembly 3.
물은 그 유입구(12)에서 유출구(13)측으로 지나면서 전처리필터조립체(1)에서 제거하지 못한 입자상 미립불순물과 각종 세균등이 중공사막필터(6)에 의하여 여과제거된다.As the water passes from the inlet 12 to the outlet 13 side, particulate fine impurities and various bacteria which cannot be removed from the pretreatment filter assembly 1 are filtered out by the hollow fiber membrane filter 6.
이 중공사막필터(6)는 세균까지 제거하기 위하여 기공의 크기가 0.2미크로 이하이므로 여과정도는 상당히 우수한 반면에 조기에 막혀버리는 문제점이 있다.Since the hollow fiber membrane filter 6 has a pore size of 0.2 micron or less in order to remove even bacteria, there is a problem in that the filtration accuracy is very good while being blocked early.
따라서 단위시간당 여과유량이 급격하게 줄어들기 때문에 정수된 물을 얻는 시간이 길고 전처리필터나 흡착필터등 다른 필터와 수명이 일치하지 않으며 또한 중공사필터가 고가이고, 짧은 주기로 교환하여 주어야 하므로 경제적 부담이 가중된다.Therefore, the filtration flow rate decreases rapidly per unit time, so the time for obtaining purified water is long, and the lifespan of other filters such as pretreatment filter and adsorption filter does not match. Also, the hollow fiber filter is expensive, and it has to be replaced at short intervals. Weighted.
본 고안에 있어서는 종래의 이와같은 점을 감안하여 안출한 것으로, 일정시간 정수사용후 전처리필터와 흡착필터를 지난 물을 중공사막필터에 역류시켜 중공사막외부에 부착된 불순물을 분리시켜 별도 배수구를 통하여 배수, 제거하므로서 정수사용시 중공사막필터의 여과효과를 다시 회복시킬 수 있도록 하여 전체 정수기의 여과 효율을 향상시키고 정수기의 사용수명을 연장시킬 수 있도록한 것인바, 이를 첨부도면에 의거하여 보다 상세히 설명하면 다음과 같다.In the present invention, in view of such a conventional point, it was devised, and after a predetermined time of use of purified water, the water passing the pretreatment filter and the adsorption filter was flowed back to the hollow fiber membrane filter to separate impurities attached to the outside of the hollow fiber membrane, and then through a separate drain hole. It is to improve the filtration efficiency of the whole water purifier and to extend the service life of the water purifier by draining and removing water, so as to recover the filtration effect of the hollow fiber membrane filter when using the purified water, which will be described in more detail based on the accompanying drawings. As follows.
전처리필터링(30)이 내장된 전처리필터조립체(31), 흡착필터링(32)이 내장된 흡착된 흡착필터조립체(33)와, 중공사막필터(34)가 내장된 중공사필터조립체(35)로 구성되고, 급수호오스(36)가 전처리필터조립체(31)의 유입구(37)에 연결되고 그 유출구(38)가 흡착필터조립체(33)의 유입구(39)에 연결되며, 다시 그 유출구(40)가 중공사필터조립체(33)의 유입구(41)측에 연결되고 그 유출구(42)가 호수구(43)측으로 연결되며 흡착필터조립체(33)의 유입구(41)사이에 선택밸브(44)를 연결한것에 있어서, 선택밸브(44)가 동일원주상에 등간격으로 흡착필터조립체(33)의 유출구(40)가 연결되는 유입관(45), 중공사필터조립체(35)의 유입구(41)에 연결되는 유출관(46), 중공사필터조립체(35)의 유출구(42)가 연결되는 중공사필터측 연결관(47), 토수구측 연결관(48)을 가지며 이들 유입관(45), 유출관(46)가 연결관(47)(48)이 배설된 동일원주상의 위치로부터 벗어난 위치에 배설된 배수연결관(49)를 갖는 원통형 밸브케이싱(50)과, 이 원통형 밸브케이싱(50)의 내부에 삽입되는 조작봉(51)이 외부로 연장된 밸브동체(52)로 구성되고, 이 밸브동체(52)에는 중앙에 직경방향으로 관통된 직경통로(53)가 형성되어 있고 밸브동체(52)의 외주면에는 직경통로(53)에 대하여 양측에 대칭으로 넓은 원호형의 안내유로(54)(55)가 형성되어 있으며, 일측 안내유로(54)에는 일측으로 편중되어 평패킹(56)을 착설하고, 양측 안내유로(54)(55)에는 그 변부측에 사각 패킹(57)(58)을 착설하여 밸브케이싱(50)에 삽입하여 배수 연결관(49)을 배수호오스(59)에 연결하여서된 구조이다.Pretreatment filter assembly 31 with pretreatment filtering 30, adsorption adsorption filter assembly 33 with adsorption filtering 32, and hollow fiber filter assembly 35 with hollow fiber membrane filter 34. The water supply hose 36 is connected to the inlet 37 of the pretreatment filter assembly 31 and the outlet 38 thereof is connected to the inlet 39 of the adsorption filter assembly 33, and again the outlet 40. It is connected to the inlet 41 side of the hollow fiber filter assembly 33, the outlet 42 is connected to the lake port 43 side and the selection valve 44 between the inlet 41 of the adsorption filter assembly 33 In connection, the inlet pipe 45 is connected to the outlet 40 of the adsorption filter assembly 33 at equal intervals on the same circumference, and the inlet port 41 of the hollow fiber filter assembly 35. The inlet pipe 46 connected to the outlet, the hollow fiber filter side connecting pipe 47 is connected to the outlet 42 of the hollow fiber filter assembly 35, the water discharge port side connecting pipe 48 and these inlet pipe 45 , A cylindrical valve casing 50 having a drain connecting pipe 49 disposed at a position deviating from the same circumferential position where the outlet pipe 46 is disposed with the outlet pipe 46; and the cylindrical valve casing 50 The operating rod 51 inserted into the inside of the valve) is composed of a valve body 52 extending outwardly, and the valve body 52 is formed with a diameter passage 53 penetrated in the radial direction at the center thereof. The outer circumferential surface of the 52 is formed with a circular arc-shaped guide flow path (54, 55) symmetrically wide on both sides with respect to the diameter passage (53), one side of the guide flow path (54) is biased to one side flat packing (56) To the two side guide flow paths (54) and (55), and install rectangular packings (57) and (58) on the side of the side, and insert the valve casing (50) into the drain hose (59). The structure is connected.
이와같이 본 고안은 정수사용시 물이 전처리필터조립체(31)와 흡착필터조립체(33)을 지나면서 물속에 함유되어 있는 입자상 불순물과 잔류염소, 그리고 냄새나 맛을 유발시키는 각종 유기물질이 흡착제거되며 이와같이 정화된 물은 선택밸브(44)를 지나 중공사필터조립체(35)측으로 보내어지고 여기에서 전처리필터나 흡착필터에서 여과되지 않은 미립자상의 불순물이나 각종 세균들이 여과제거되고 최종 정수된다.As such, the present invention absorbs and removes particulate impurities, residual chlorine, and various organic substances that cause odors and tastes in water as the water passes through the pretreatment filter assembly 31 and the adsorption filter assembly 33 when using purified water. The purified water is passed through the selection valve 44 to the hollow fiber filter assembly 35, where impurities and various bacteria which are not filtered by the pretreatment filter or the adsorption filter are filtered out and finally purified.
이때에 선택밸브(44)는 그 밸브동체(52)가 조작봉(51)에 의하여 위치가 선택되며 일측 안내유로(54)가 흡착필터조립체(33)의 유출기(40)에 연결된 유입관(45)과 중공사필터조립체(31)의 유입구(41)에 연결된 유출관(46)에 걸쳐 있어 이들 유입관(45)과 유출관(46)을 연결하고 이 일측 안내유로(54)내에 착설된 평패킹(56)은 배수연결관(49)을 폐쇄하여 흡착필터조립체(33)의 유출구(40)측으로 정화되어 나온 물이 이 안내유로(54)를 통하여 중공사필터조립체(35)로 공급되어 여기에서 최종 정수된다.At this time, the selector valve 44 has a valve body 52 whose position is selected by the operating rod 51, and one side guide passage 54 is connected to the outlet 40 of the adsorption filter assembly 33 ( 45) and the outlet pipe 46 connected to the inlet 41 of the hollow fiber filter assembly 31 to connect these inlet pipe 45 and the outlet pipe 46 and installed in the one side guide passage 54. The flat packing 56 closes the drain connection pipe 49 and the water purified to the outlet 40 of the adsorption filter assembly 33 is supplied to the hollow fiber filter assembly 35 through the guide passage 54. Here is the final integer.
그리고 타측 안내유로(55)은 중공사필터측 연결관(47)과 호수구측 연결관(48)을 연결하여 중공사필터조립체(31)에서 최종 정수된 물이 호수구(43)측으로 호수된다.The other side guide passage 55 connects the hollow fiber filter side connecting pipe 47 and the lake mouth side connecting pipe 48 so that the final purified water from the hollow fiber filter assembly 31 is laked toward the lake mouth 43.
이와같이 막형정수기를 사용하여 물을 정수한 후에 일정한 기간이 지나면 이미 언급된 바와같이 중고사막필터(34)의 외부에는 불순물이 부착되어 기공을 폐색시키므로서 유량이 감소된다.As described above, after a certain period of time after the water is purified using the membrane water purifier, impurities are attached to the outside of the used sand filter 34 to block the pores, thereby decreasing the flow rate.
이때에는 선택밸브(44)를 조작하여 밸브동체(52)의 위치를 바꾸어 주어 중공사막필터(34)의 역세척이 이루어지도록 한다.At this time, the position of the valve body 52 is changed by operating the selector valve 44 so that the hollow fiber membrane filter 34 is backwashed.
즉 밸브동체(52)는 이를 시계반대방향으로 회전시켜 그 직경통로(53)가 유입관(45)과 중공사필터측연결관(47)을 연결시키도록 하고 안내유로(54)는 중공사필터조립체(35)의 유입구(41)에 연결된 유출관(46)과 배수연결관(49)이 연결되도록 한다.That is, the valve body 52 rotates it counterclockwise so that the diameter passage 53 connects the inlet pipe 45 and the hollow fiber filter side connecting pipe 47, and the guide passage 54 is the hollow fiber filter. The outlet pipe 46 and the drain connection pipe 49 connected to the inlet 41 of the assembly 35 are connected.
이때에 흡착필터조립체(33)를 통과한 물이 직경통로(53)를 지나 중공사필터조립체(35)의 유출구(42)측으로 역류하고 그 내부의 중공사막필터(34)를 통하여 역류하므로서 주공사막필터(34)의 외부에 부착되어 있는 불순물이 분리되게 한다.At this time, the water passing through the adsorption filter assembly 33 flows back through the diameter passage 53 to the outlet 42 side of the hollow fiber filter assembly 35 and backflows through the hollow fiber membrane filter 34 therein. The impurities attached to the outside of the filter 34 are separated.
이와같이 불순물이 분리되어 포함되어 있는 물은 안내유로(54)를 통하여 배수연결관(49)에 연결된 배수호오스(59)측을 배수된다.In this way, the water containing the impurities separated is drained to the drain hose 59 side connected to the drain connection pipe 49 through the guide passage (54).
따라서, 중공사막필터(34)는 세척되어 이후 정수사용시 불순물에 의한 유량감소현상을 방지할 수 있다.Therefore, the hollow fiber membrane filter 34 may be washed to prevent the flow rate decrease caused by impurities during the use of purified water.
그리고 중공사막필터(34)는 그 사용수명이 크게 연장되어 경제적인 부담을 줄일 수 있다.And the hollow fiber membrane filter 34 can be used to greatly extend the service life can reduce the economic burden.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910021489U KR950000846Y1 (en) | 1991-12-05 | 1991-12-05 | Reverse washing device for water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910021489U KR950000846Y1 (en) | 1991-12-05 | 1991-12-05 | Reverse washing device for water purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930013215U KR930013215U (en) | 1993-07-26 |
| KR950000846Y1 true KR950000846Y1 (en) | 1995-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910021489U KR950000846Y1 (en) | 1991-12-05 | 1991-12-05 | Reverse washing device for water purifier |
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| Country | Link |
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| KR (1) | KR950000846Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100912186B1 (en) * | 2007-06-05 | 2009-08-21 | 웅진코웨이주식회사 | Washing Device for A Filter in A Water Purifier |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100416136B1 (en) * | 1997-02-05 | 2004-05-17 | 주식회사 하이필 | Backwash type water purifier |
-
1991
- 1991-12-05 KR KR2019910021489U patent/KR950000846Y1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100912186B1 (en) * | 2007-06-05 | 2009-08-21 | 웅진코웨이주식회사 | Washing Device for A Filter in A Water Purifier |
Also Published As
| Publication number | Publication date |
|---|---|
| KR930013215U (en) | 1993-07-26 |
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